AtmostormCounty briefing

McHenry County, IL

Severe-weather activation briefing

Generated 2026-09-20T14:08:23.335119+00:00

1 active warning

Radar over McHenry County, IL with the warned area outlined

In the warned path — county-wide (estimate)

~0 residents

Active warnings (1)

1. Flood Watchuntil 2026-09-20T17:15:00+00:00

Flood Watch issued September 20 at 4:12AM CDT until September 24 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

In path: ~0 residents.

Storm details · Full facility list (per-warning briefing)

County exposure (baseline)

McHenry County, IL has an estimated 310,229 residents, including 9 nursing homes, 1 mobile-home park, 8 dialysis centers, 2 hospitals and 89 schools. This is the denominator behind “in the warned path”.